Castell d'Albinyana is a hilltop fortress in Albinyana, Baix Penedès region of Tarragona, declared a property of cultural interest. Built initially as a surveillance and defense structure, the castle traces its origins to 986 when the region was reconquered by Adalbert, viscount's son, who later bequeathed it to the monastery of Sant Cugat del Vallès in 1010. An abbot's charter from 1040 mandated the construction of stone and lime towers within seven years. The ruins today reveal well-built stone walls with lime mortar, including a watchtower base, situated near the chapel of Sant Antoni and remaining as evidence of monastic control over regional fortifications.
